The tiny TFA9896 smart power amplifier enhances user experience with great battery consumption performance, improved call quality and more loudness.

TFA9896 Smart Power Amplifier

FEATURES AND BENEFITS OF TFA9896

} Higher output power – 2.1 W–8 Ohm and 3.2 W–4 Ohm – 6.1 V voltage boost – >3.4 Ohm speaker impedance

} Power consumption – Ultra-low power idle mode 22mW – > 80% Efficiency when playing standard audio

} Embedded DSP } Speaker Protection 2.0 } Proposed with NXP® Audio Software suite } Package size: 2.72 x 2.06 mm

Get louder sound from a small, power-efficient amplifier

HIGH EFFICIENCY Improved battery consumption extends audio playback time

PERFORMANCE AND SOUND QUALITY Get better loudness and sound quality at 6.1V than available 8V solutions

EFFICIENCY COMPARISON

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Document Number: TFA9896FS REV 0

6.1 V Boost Converter

Speaker Protect andAudio Boost

Model

Current Sensing

Embedded

Class-D

Aud

io In

Loudspeaker

TFA9896 BLOCK DIAGRAMKEY FEATURES

} SPK Class-D – 2.1W into 8 Ohm (THD <1%; VBAT= 4V) – 3.2W into 4 Ohm (THD <1%; VBAT= 4V) – Low noise: 27 µV at normal gain mode; 18 µV at low gain mode

} 6.1V DC-DC Boost – Enabling high output power to the speaker – High system efficiency

} Power consumption – Ultra-low power idle mode: 22 mW at silent input (DSP bypassed) – Optimized battery consumption of 169 mW at POUT =130 mW average – Total system efficiency >83% POUT= 1W, RL= 8 Ohm and VBAT=4V

} Embedded DSP (optional to use) – Speaker damage protection for thermal mechanical damage overload and enhanced loudness on speaker for 2 to 3 dB – Enhanced battery safeguard

} 2 x TDM Full Duplex (Four lines) – Support for 2 to 16 slots – Input and output for main audio stream, speaker current and voltage monitoring for enhancing acoustic echo cancellation (AEC) – Gain I/O synchronization

Date of release: April 2017

PCB AREA Optimized area and cost

Size Optimized Products Premium Products

TFA9895 TFA9896 TFA9891 TFA9892 TFA9872 TFA9888

Product Information

Embedded DSP Yes Yes Yes Yes No Yes

Package type WLCSP29 WLCSP30 WLCSP49 WLCSP49 WLCSP42 WLCSP99

Package size 3.19 x 2.07 x 0.6 2.72 x 2.06 x 0.5 3.43 x 2.98 x 0.6 3.63 x 3.13 x 0.5 3.13 x 2.46 x 0.5 4.37 x 3.82 x 0.5

Interfaces

Audio input interface 2 x TDM-I2S TDM-I2S 2 Data2 x TDM-I2S or 1 x PDM

2 x TDM-I2S or 1 x PDM

TDM-I2S 2 DataTDM-I2S 3 Data

and PDM

Inter-chip communication TDM-I2S TDM-I2S 2 Data TDM-I2S, PDM TDM-I2S, PDMTDM-I2S 2 Data, PDM, Aux SAM

TDM-I2S 3 Data, PDM, 4 GPIOs

AAEC feedback Yes Yes Yes Yes Yes Yes

Performance

Boost voltage 5.3 V 6.1 V 9.5 V 12 V 9.5 V 9.7 V

RMS output power (8Ω) 1.65 W 2.1 W 3.7 W 6.6 W 5.1 W 2 x 2.4 W

RMS output power (4Ω) 2.65 W 3.2 W 3.7 W 7 W 6 W 2 x 2.4 W

Speaker channels Mono Mono Mono Mono Mono Stereo

Typical speaker load (Ω) 4-8 4-8-32 4-8 4-8-32 4-8-32 8-32

PSRR (dB) 90 90 75 75 80 80

SNR (dB) 97 100 97 115 100 103

MB-DRC (On Host) (On Host) Yes (3-band) Yes (3-band) (On host) Yes (7-band)

TDH+N 0.03% 0.03% 0.03% 0.04% 0.04% 0.03%

Noise (µV) /receiver mode 45/31 27/18 66 16 19 42/11

Special Features

Speaker as microphone No No No No (On host) V2.0 No

Smart tap detection No No No No (On host) V2.0 No

SMART AMPLIFER PORFOLIO